Thursday, September 2nd, 2010

Cyclepedia Press LLC – Online ATV, Motorcycle and Scooter Repair Manuals

Shift Drum

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A shift drum is a cylindrical shaped transmission component with machined slots around its outside diameter. When actuated by the external shift mechanism it moves the the internal shift forks. As the shift drum is rotated, drum slots cause the shift forks to move sliding gears or dogs, causing the engagement and disengagement of various transmission ratios.

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